Abeje, Abebaw http://orcid.org/0000-0002-9877-5212
Berhanu, Zerihun
Article History
Received: 26 December 2018
Accepted: 10 August 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from Institutional Review Board (IRB) of the University of Gondar and presented to Debremarkos town education bureau. Official permission was obtained from Debremarkos town education bureau and each school. Finally, written informed consent was taken from each student or their parents and/or guardians (for those with age < 18 years old).
: Not applicable.
: All the authors declare that they have no competing interests.